EP2345801A1 - Centrifugal oil separator for blow-by gas of combustion engine - Google Patents

Centrifugal oil separator for blow-by gas of combustion engine Download PDF

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Publication number
EP2345801A1
EP2345801A1 EP11002670A EP11002670A EP2345801A1 EP 2345801 A1 EP2345801 A1 EP 2345801A1 EP 11002670 A EP11002670 A EP 11002670A EP 11002670 A EP11002670 A EP 11002670A EP 2345801 A1 EP2345801 A1 EP 2345801A1
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EP
European Patent Office
Prior art keywords
oil separator
centrifugal oil
combustion engine
drive shaft
internal combustion
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Granted
Application number
EP11002670A
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German (de)
French (fr)
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EP2345801B1 (en
Inventor
Michael Hoffmann
Andreas Ruess
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Mercedes Benz Group AG
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Daimler AG
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Publication of EP2345801A1 publication Critical patent/EP2345801A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a centrifugal oil separator for blow-by gases of an internal combustion engine according to the preamble of claim 1.
  • centrifugal oil separators are used in venting devices of the crankcase of an internal combustion engine for separating oil from an oil / air mixture, which is derived from the cylinder head of the internal combustion engine.
  • the vent line for the cleaned of the oil air opens into the air intake pipe of the internal combustion engine.
  • the blow-by gases are thus constantly, i. in all operating conditions, extracted from the crankcase of the internal combustion engine and conveyed back into the intake, whereby they are fed to a re-combustion in the cylinders.
  • Such a venting of the blow-by gases reduces the contamination of the oil considerably, which can result in much longer oil change intervals.
  • Such a centrifugal oil separator for blow-by gases of an internal combustion engine is for example from DE 196 07 919 A1 or the DE 199 47 143 C1 known.
  • the Indian DE 196 07 919 A1 described centrifugal oil separator is characterized by a particularly effective oil separation from the blow-by gases, while in the DE 199 47 143 C1 disclosed centrifugal oil separator is constructed in a particularly compact construction.
  • the present invention is based on the object to provide a centrifugal oil separator with a simple and inexpensive rotary drive of its rotating component.
  • the inventive centrifugal oil separator for blow-by gases of an internal combustion engine is characterized in that the drive shaft of the rotating component is connected to a hydraulic drive, which in a fluid line of the Internal combustion engine is integrated. Also in this case, existing components of an internal combustion engine are used for the rotary drive of the drive shaft of the centrifugal oil separator, which is why the centrifugal oil separator of the invention is technically simple and inexpensive to implement.
  • the hydraulic drive is integrated into a fuel line leading to the internal combustion engine.
  • the hydraulic drive is integrated into a low-pressure fuel circuit between a fuel delivery pump and a high-pressure fuel pump. It can be assumed that the fuel pump in some operating states of the internal combustion engine promotes an excess amount of fuel whose excess energy can thus be used to drive the centrifugal oil separator, without having to apply additional energy.
  • a controllable clutch for controlling the rotational speed of the rotating component of the centrifugal oil separator.
  • FIG. 1 Reference numeral 10 characterized centrifugal oil separator for blow-by gases, which are derived from the crankcase of an internal combustion engine, has a rotating component, which is provided with a drive shaft 12 for rotary drive.
  • the rotating component has in the usual way at least one inlet opening for the introduction of blow-by gases from the crankcase of the internal combustion engine, at least one first outflow opening for the discharge of air and at least one second outflow opening for the discharge of oil.
  • the present invention is not limited to a specific construction of a centrifugal oil separator, but rather any constructions of centrifugal oil separators can be used, the rotating component is coupled to a drive shaft.
  • the drive shaft 12 of the rotary member of the centrifugal oil separator 10 is in the embodiment of FIG. 1 by means of a mechanical coupling (not shown) connected to a change-speed gearbox 14.
  • the change-speed gearbox 14 is driven in a conventional manner by the crankshaft 16 of the internal combustion engine.
  • the centrifugal oil separator 10 according to the in FIG. 1 illustrated embodiment is thus only a mechanical coupling to existing components of the internal combustion engine, in this case the change-speed gearbox required. With a suitable translation of the mechanical coupling between the drive shaft 12 and the change-speed gearbox 14, the required rotational speeds of the centrifugal oil separator 10 can be easily achieved.
  • FIG. 1 can be optionally provided between the drive shaft 12 of the centrifugal oil separator 10 and the change-speed gearbox 14, a controllable clutch 18 to control the rotational speed of the drive shaft 12 and thus the rotating member of the centrifugal oil separator 10.
  • FIG. 2 shows an alternative embodiment of FIG. 1 for the rotary drive of a centrifugal oil separator 10.
  • the same components or components of this alternative embodiment are denoted by the same reference numerals as in the embodiment of FIG. 1 Mistake.
  • the drive shaft 12 of the rotary member of the centrifugal oil separator 10 is in the embodiment of FIG. 2 connected to a turbo compound transmission 15 via a suitable mechanical coupling.
  • the turbocompound gear is driven in a known manner by the crankshaft 16 of the internal combustion engine.
  • the coupling of the drive shaft 12 of the rotating component of the centrifugal oil separator 10 with a turbo compound transmission 15 has the advantage that due to the high speed level of the turbocompound transmission 15 in general, no further translation of the mechanical coupling between the drive shaft 12 and the gear 15 is required to the to reach high speeds of the centrifugal oil separator 10.
  • the drive shaft of the centrifugal oil separator is coupled with a gear change transmission or a turbo compound transmission
  • the present invention is basically also applicable to other types of transmission that are driven via the crankshaft of the internal combustion engine.
  • the basically arbitrarily constructed centrifugal oil separator 10 has a rotating component which is connected to a drive shaft 12. Furthermore, the rotating component of the centrifugal oil separator at least one inlet opening for the introduction of blow-by gases from the crankcase of the internal combustion engine, at least a first discharge opening for the discharge of air and at least a second discharge opening for the discharge of oil.
  • the drive shaft 12 of the rotary member of the centrifugal oil separator is, as in FIG. 3 shown connected to a hydraulic drive 20.
  • the hydraulic drive 20 is integrated in an existing fluid line of the internal combustion engine, so that this rotary drive of the centrifugal oil separator is due to the use of existing components of the internal combustion engine technically simple and inexpensive to implement.
  • the hydraulic drive 20 of the drive shaft 12 of the centrifugal oil separator 10 is integrated into a low-pressure fuel circuit between a fuel feed pump 22 and a high-pressure fuel pump 24.
  • part of the fuel volume flow delivered by the fuel feed pump is converted into rotational energy in the hydraulic drive 20 and transmitted to the drive shaft 12.
  • the rotary drive of the centrifugal oil separator 10 can be considered that by attaching a suitable hydraulic drive 20 in the already existing Fuel circuit relatively simple, the required rotational movement of the drive shaft 12 and thus the rotating member of the centrifugal oil separator 10 can be achieved.
  • the fuel delivery pump 22 promotes an excess amount of fuel in some operating states of the internal combustion engine, whose energy can thus be used for the rotary drive of the centrifugal oil separator 10, without having to apply additional energy.
  • the hydraulic drive 20 may also be integrated directly into a leading to the engine fuel line.
  • a controllable clutch (not shown) between the drive shaft 12 of the rotary member of the centrifugal oil separator 10 and the hydraulic drive 20 to control the rotational speed of the drive shaft 12 of the Centrifugal oil separator to control.

Abstract

Centrifugal oil separator (10) comprises a rotating component having a drive shaft (12) which is connected via a mechanical coupling to a transmission (14) driven by a crankshaft (16) of an I.C. engine. Preferred Features: The transmission is a toothed wheel change gear. A coupling (18) for controlling the revolutions of the rotating component of the centrifugal oil separator is arranged between the drive shaft and the transmission. The drive shaft is connected to a hydraulic drive which is integrated in a fuel line of the engine. The hydraulic drive is integrated in a low pressure fuel cycle between a fuel conveying pump and a fuel high pressure pump.

Description

Die Erfindung betrifft einen Zentrifugal-Ölabscheider für Blow-By-Gase einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a centrifugal oil separator for blow-by gases of an internal combustion engine according to the preamble of claim 1.

Derartige Zentrifugal-Ölabscheider werden bei Entlüftungsvorrichtungen des Kurbelgehäuses einer Brennkraftmaschine zum Abscheiden von Öl aus einem Öl/Luft-Gemisch verwendet, welches aus dem Zylinderkopf der Brennkraftmaschine abgeleitet wird. Die Entlüftungsleitung für die von dem Öl gereinigte Luft mündet in die Luftansaugleitung der Brennkraftmaschine. Die Blow-By-Gase werden somit ständig, d.h. in allen Betriebszuständen, aus dem Kurbelraum der Brennkraftmaschine abgesaugt und in die Ansaugleitung zurück gefördert, wodurch sie einer erneuten Verbrennung in den Zylindern zugeführt werden. Durch eine solche Entlüftung der Blow-By-Gase verringert sich die Verschmutzung des Öls erheblich, wodurch sich viel längere Ölwechselintervalle ergeben können.Such centrifugal oil separators are used in venting devices of the crankcase of an internal combustion engine for separating oil from an oil / air mixture, which is derived from the cylinder head of the internal combustion engine. The vent line for the cleaned of the oil air opens into the air intake pipe of the internal combustion engine. The blow-by gases are thus constantly, i. in all operating conditions, extracted from the crankcase of the internal combustion engine and conveyed back into the intake, whereby they are fed to a re-combustion in the cylinders. Such a venting of the blow-by gases reduces the contamination of the oil considerably, which can result in much longer oil change intervals.

Ein derartiger Zentrifugal-Ölabscheider für Blow-By-Gase einer Brennkraftmaschine ist beispielsweise aus der DE 196 07 919 A1 oder der DE 199 47 143 C1 bekannt. Der in der DE 196 07 919 A1 beschriebene Zentrifugal-Ölabscheider zeichnet sich durch eine besonders effektive Ölabscheidung aus den Blow-By-Gasen aus, während der in der DE 199 47 143 C1 offenbarte Zentrifugal-Ölabscheider in einer besonders kompakten Konstruktion aufgebaut ist.Such a centrifugal oil separator for blow-by gases of an internal combustion engine is for example from DE 196 07 919 A1 or the DE 199 47 143 C1 known. The Indian DE 196 07 919 A1 described centrifugal oil separator is characterized by a particularly effective oil separation from the blow-by gases, while in the DE 199 47 143 C1 disclosed centrifugal oil separator is constructed in a particularly compact construction.

Der vorliegenden Erfindung liegt demgegenüber die Aufgabe zugrunde, einen Zentrifugal-Ölabscheider mit einem einfachen und kostengünstigen Drehantrieb seines rotierenden Bauelements bereitzustellen.The present invention is based on the object to provide a centrifugal oil separator with a simple and inexpensive rotary drive of its rotating component.

Der erfindungsgemäße Zentrifugal-Ölabscheider für Blow-By-Gase einer Brennkraftmaschine zeichnet sich dadurch aus, dass die Antriebswelle des rotierenden Bauelements mit einem hydraulischen Antrieb verbunden ist, der in eine Fluidleitung der Brennkraftmaschine integriert ist. Auch in diesem Fall werden bereits vorhandene Komponenten einer Brennkraftmaschine für den Drehantrieb der Antriebswelle des Zentrifugal-Ölabscheiders genutzt, weshalb der Zentrifugal-Ölabscheider der Erfindung technisch einfach und kostengünstig zu realisieren ist.The inventive centrifugal oil separator for blow-by gases of an internal combustion engine is characterized in that the drive shaft of the rotating component is connected to a hydraulic drive, which in a fluid line of the Internal combustion engine is integrated. Also in this case, existing components of an internal combustion engine are used for the rotary drive of the drive shaft of the centrifugal oil separator, which is why the centrifugal oil separator of the invention is technically simple and inexpensive to implement.

In einer Ausgestaltung der Erfindung ist der hydraulische Antrieb in eine zu der Brennkraftmaschine führende Kraftstoffleitung integriert. In einer alternativen Ausgestaltung der Erfindung ist der hydraulische Antrieb in einen Niederdruck-Kraftstoffkreislauf zwischen einer Kraftstoff-Förderpumpe und einer Kraftstoff-Hochdruckpumpe integriert. Es kann davon ausgegangen werden, dass die Kraftstoffpumpe in einigen Betriebszuständen der Brennkraftmaschine eine überschüssige Kraftstoffmenge fördert, deren überschüssige Energie somit für den Antrieb des Zentrifugal-Ölabscheiders verwendet werden kann, ohne eine zusätzliche Energie aufbringen zu müssen.In one embodiment of the invention, the hydraulic drive is integrated into a fuel line leading to the internal combustion engine. In an alternative embodiment of the invention, the hydraulic drive is integrated into a low-pressure fuel circuit between a fuel delivery pump and a high-pressure fuel pump. It can be assumed that the fuel pump in some operating states of the internal combustion engine promotes an excess amount of fuel whose excess energy can thus be used to drive the centrifugal oil separator, without having to apply additional energy.

In einer weiteren Ausgestaltung der Erfindung kann bei dem Zentrifugal-Ölabscheider zwischen der Antriebswelle und dem hydraulischen Antrieb eine regelbare Kupplung zur Steuerung der Drehzahl des rotierenden Bauelements des Zentrifugal-Ölabscheiders vorgesehen sein.In a further embodiment of the invention may be provided in the centrifugal oil separator between the drive shaft and the hydraulic drive, a controllable clutch for controlling the rotational speed of the rotating component of the centrifugal oil separator.

Weitere Merkmale und Merkmalskombinationen ergeben sich aus der Beschreibung sowie den Zeichnungen. Konkrete Ausführungsbeispiele der Erfindung sind in den Zeichnungen vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
ein stark vereinfachtes Blockschaltbild des Drehantriebs eines Zentrifugal-Ölabscheiders;
Fig. 2
ein stark vereinfachtes Blockschaltbild einer alternativen Ausführungsform eines Zentrifugal-Ölabscheiders gemäß Fig. 1; und
Fig. 3
ein stark vereinfachtes Blockschaltbild des Drehantriebs eines Zentrifugal-Ölabscheiders gemäß der vorliegenden Erfindung.
Further features and combinations of features result from the description and the drawings. Concrete embodiments of the invention are shown in simplified form in the drawings and explained in more detail in the following description. Show it:
Fig. 1
a highly simplified block diagram of the rotary drive of a centrifugal oil separator;
Fig. 2
a highly simplified block diagram of an alternative embodiment of a centrifugal oil separator according to Fig. 1 ; and
Fig. 3
a highly simplified block diagram of the rotary drive of a centrifugal oil separator according to the present invention.

Der in Figur 1 mit der Bezugsziffer 10 gekennzeichnete Zentrifugal-Ölabscheider für Blow-By-Gase, die aus dem Kurbelgehäuse einer Brennkraftmaschine abgeleitet werden, weist ein rotierendes Bauelement auf, welches mit einer Antriebswelle 12 zum Drehantrieb versehen ist. Das rotierende Bauelement weist in üblicher Weise wenigstens eine Einströmöffnung für die Einleitung von Blow-By-Gasen aus dem Kurbelgehäuse der Brennkraftmaschine, wenigstens eine erste Abströmöffnung für die Ableitung von Luft und wenigstens eine zweite Abströmöffnung für die Ableitung von Öl auf. Es sei an dieser Stelle ausdrücklich darauf hingewiesen, dass die vorliegende Erfindung nicht auf eine spezielle Konstruktion eines Zentrifugal-Ölabscheiders beschränkt ist, sondern dass vielmehr beliebige Konstruktionen von Zentrifugal-Ölabscheidern verwendet werden können, deren rotierendes Bauelement mit einer Antriebswelle gekoppelt ist.The in FIG. 1 Reference numeral 10 characterized centrifugal oil separator for blow-by gases, which are derived from the crankcase of an internal combustion engine, has a rotating component, which is provided with a drive shaft 12 for rotary drive. The rotating component has in the usual way at least one inlet opening for the introduction of blow-by gases from the crankcase of the internal combustion engine, at least one first outflow opening for the discharge of air and at least one second outflow opening for the discharge of oil. It should be noted at this point that the present invention is not limited to a specific construction of a centrifugal oil separator, but rather any constructions of centrifugal oil separators can be used, the rotating component is coupled to a drive shaft.

Die Antriebswelle 12 des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 ist in dem Ausführungsbeispiel von Figur 1 mittels einer mechanischen Kopplung (nicht dargestellt) mit einem Zahnräderwechselgetriebe 14 verbunden. Das Zahnräderwechselgetriebe 14 wird in üblicher Weise durch die Kurbelwelle 16 der Brennkraftmaschine angetrieben. Bei dem Zentrifugal-Ölabscheider 10 gemäß dem in Figur 1 dargestellten Ausführungsbeispiel ist somit lediglich eine mechanische Kopplung zu bereits bestehenden Komponenten der Brennkraftmaschine, in diesem Fall dem Zahnräderwechselgetriebe, erforderlich. Bei einer geeigneten Übersetzung der mechanischen Kopplung zwischen der Antriebswelle 12 und dem Zahnräderwechselgetriebe 14 können problemlos die erforderlichen Drehzahlen des Zentrifugal-Ölabscheiders 10 erzielt werden.The drive shaft 12 of the rotary member of the centrifugal oil separator 10 is in the embodiment of FIG. 1 by means of a mechanical coupling (not shown) connected to a change-speed gearbox 14. The change-speed gearbox 14 is driven in a conventional manner by the crankshaft 16 of the internal combustion engine. In the centrifugal oil separator 10 according to the in FIG. 1 illustrated embodiment is thus only a mechanical coupling to existing components of the internal combustion engine, in this case the change-speed gearbox required. With a suitable translation of the mechanical coupling between the drive shaft 12 and the change-speed gearbox 14, the required rotational speeds of the centrifugal oil separator 10 can be easily achieved.

Wie in Figur 1 dargestellt, kann zwischen der Antriebswelle 12 des Zentrifugal-Ölabscheiders 10 und dem Zahnräderwechselgetriebe 14 optional eine regelbare Kupplung 18 vorgesehen sein, um die Drehzahl der Antriebswelle 12 und damit des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 zu steuern.As in FIG. 1 can be optionally provided between the drive shaft 12 of the centrifugal oil separator 10 and the change-speed gearbox 14, a controllable clutch 18 to control the rotational speed of the drive shaft 12 and thus the rotating member of the centrifugal oil separator 10.

Figur 2 zeigt eine alternative Ausführungsform von Figur 1 für den Drehantrieb eines Zentrifugal-Ölabscheiders 10. Gleiche Komponenten bzw. Bauteile dieser alternativen Ausführungsform sind mit den gleichen Bezugsziffern wie in dem Ausführungsbeispiel von Figur 1 versehen. FIG. 2 shows an alternative embodiment of FIG. 1 for the rotary drive of a centrifugal oil separator 10. The same components or components of this alternative embodiment are denoted by the same reference numerals as in the embodiment of FIG. 1 Mistake.

Die Antriebswelle 12 des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 ist in der Ausführungsform von Figur 2 mit einem Turbocompoundgetriebe 15 über eine geeignete mechanische Kopplung verbunden. Das Turbocompoundgetriebe wird in bekannter Weise von der Kurbelwelle 16 der Brennkraftmaschine angetrieben. Die Kopplung der Antriebswelle 12 des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 mit einem Turbocompoundgetriebe 15 hat den Vorteil, dass aufgrund des hohen Drehzahlniveaus des Turbocompoundgetriebes 15 im allgemeinen keine weitere Übersetzung der mechanischen Kopplung zwischen der Antriebswelle 12 und dem Getriebe 15 erforderlich ist, um die hohen Drehzahlen des Zentrifugal-Ölabscheiders 10 zu erreichen. Auch bei dieser Ausführungsform ist es jedoch möglich, zwischen der Antriebswelle 12 des Zentrifugal-Ölabscheiders 10 und dem Turbocompoundgetriebe 15 eine regelbare Kupplung 18 zur Steuerung der Drehzahl der Antriebswelle 12 bzw. des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 vorzusehen.The drive shaft 12 of the rotary member of the centrifugal oil separator 10 is in the embodiment of FIG. 2 connected to a turbo compound transmission 15 via a suitable mechanical coupling. The turbocompound gear is driven in a known manner by the crankshaft 16 of the internal combustion engine. The coupling of the drive shaft 12 of the rotating component of the centrifugal oil separator 10 with a turbo compound transmission 15 has the advantage that due to the high speed level of the turbocompound transmission 15 in general, no further translation of the mechanical coupling between the drive shaft 12 and the gear 15 is required to the to reach high speeds of the centrifugal oil separator 10. Also with this Embodiment, however, it is possible to provide a controllable clutch 18 for controlling the rotational speed of the drive shaft 12 and the rotating member of the centrifugal oil separator 10 between the drive shaft 12 of the centrifugal oil separator 10 and the turbo compound.

Während bei den in Figuren 1 und 2 dargestellten Ausführungsbeispielen des Zentrifugal-Ölabscheiders gemäß dem ersten Aspekt der vorliegenden Erfindung die Antriebswelle des Zentrifugal-Ölabscheiders mit einem Zahnräderwechselgetriebe bzw. einem Turbocompoundgetriebe gekoppelt ist, ist die vorliegende Erfindung grundsätzlich auch für andere Getriebearten, die über die Kurbelwelle der Brennkraftmaschine angetrieben werden, anwendbar.While at the in Figures 1 and 2 In the illustrated embodiments of the centrifugal oil separator according to the first aspect of the present invention, the drive shaft of the centrifugal oil separator is coupled with a gear change transmission or a turbo compound transmission, the present invention is basically also applicable to other types of transmission that are driven via the crankshaft of the internal combustion engine.

Es wird nun anhand von Figur 3 ein Drehantrieb eines Zentrifugal-Ölabscheiders gemäß dem zweiten Aspekt der vorliegenden Erfindung näher erläutert.It will now be based on FIG. 3 a rotary drive of a centrifugal oil separator according to the second aspect of the present invention explained in more detail.

Der grundsätzlich beliebig aufgebaute Zentrifugal-Ölabscheider 10 weist ein rotierendes Bauelement auf, das mit einer Antriebswelle 12 verbunden ist. Ferner weist das rotierende Bauelement des Zentrifugal-Ölabscheiders wenigstens eine Einströmöffnung für die Einleitung von Blow-By-Gasen aus dem Kurbelgehäuse der Brennkraftmaschine, wenigstens eine erste Abströmöffnung für die Ableitung von Luft und wenigstens eine zweite Abströmöffnung für die Ableitung von Öl auf.The basically arbitrarily constructed centrifugal oil separator 10 has a rotating component which is connected to a drive shaft 12. Furthermore, the rotating component of the centrifugal oil separator at least one inlet opening for the introduction of blow-by gases from the crankcase of the internal combustion engine, at least a first discharge opening for the discharge of air and at least a second discharge opening for the discharge of oil.

Die Antriebswelle 12 des rotierenden Bauelements des Zentrifugal-Ölabscheiders ist, wie in Figur 3 dargestellt, mit einem hydraulischen Antrieb 20 verbunden. Der hydraulische Antrieb 20 ist in eine vorhandene Fluidleitung der Brennkraftmaschine integriert, sodass auch dieser Drehantrieb des Zentrifugal-Ölabscheiders aufgrund der Verwendung bereits vorhandener Komponenten der Brennkraftmaschine technisch einfach und kostengünstig zu realisieren ist.The drive shaft 12 of the rotary member of the centrifugal oil separator is, as in FIG. 3 shown connected to a hydraulic drive 20. The hydraulic drive 20 is integrated in an existing fluid line of the internal combustion engine, so that this rotary drive of the centrifugal oil separator is due to the use of existing components of the internal combustion engine technically simple and inexpensive to implement.

In dem in Figur 3 dargestellten Ausführungsbeispiel ist der hydraulische Antrieb 20 der Antriebswelle 12 des Zentrifugal-Ölabscheiders 10 in einen Niederdruck-Kraftstoffkreislauf zwischen einer Kraftstoff-Förderpumpe 22 und einer Kraftstoff-Hochdruckpumpe 24 integriert. Hierbei wird ein Teil des von der Kraftstoff-Förderpumpe geförderten Kraftstoffvolumenstroms in dem hydraulischen Antrieb 20 in Drehenergie umgesetzt und auf die Antriebswelle 12 übertragen. Als besonderer Vorteil dieser Ausführungsform des Drehantriebs des Zentrifugal-Ölabscheiders 10 kann angesehen werden, dass durch das Anbringen eines geeigneten hydraulischen Antriebs 20 in den bereits vorhandenen Kraftstoffkreislauf relativ einfach die erforderliche Drehbewegung der Antriebswelle 12 und damit des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 erreicht werden kann. Zudem ist davon auszugehen, dass die Kraftstoff-Förderpumpe 22 in einigen Betriebszuständen der Brennkraftmaschine eine überschüssige Kraftstoffmenge fördert, deren Energie somit für den Drehantrieb des Zentrifugal-Ölabscheiders 10 verwendet werden kann, ohne zusätzliche Energie aufbringen zu müssen.In the in FIG. 3 1, the hydraulic drive 20 of the drive shaft 12 of the centrifugal oil separator 10 is integrated into a low-pressure fuel circuit between a fuel feed pump 22 and a high-pressure fuel pump 24. In this case, part of the fuel volume flow delivered by the fuel feed pump is converted into rotational energy in the hydraulic drive 20 and transmitted to the drive shaft 12. As a particular advantage of this embodiment of the rotary drive of the centrifugal oil separator 10 can be considered that by attaching a suitable hydraulic drive 20 in the already existing Fuel circuit relatively simple, the required rotational movement of the drive shaft 12 and thus the rotating member of the centrifugal oil separator 10 can be achieved. In addition, it can be assumed that the fuel delivery pump 22 promotes an excess amount of fuel in some operating states of the internal combustion engine, whose energy can thus be used for the rotary drive of the centrifugal oil separator 10, without having to apply additional energy.

In einer alternativen Ausführungsform des in Figur 3 dargestellten Drehantriebs kann der hydraulische Antrieb 20 auch direkt in eine zu der Brennkraftmaschine führende Kraftstoffleitung integriert sein. Ferner ist es auch bei dem Zentrifugal-Ölabscheider gemäß dem zweiten Aspekt der Erfindung möglich, zwischen der Antriebswelle 12 des rotierenden Bauelements des Zentrifugal-Ölabscheiders 10 und dem hydraulischen Antrieb 20 eine regelbare Kupplung (nicht dargestellt) vorzusehen, um die Drehzahl der Antriebswelle 12 des Zentrifugal-Ölabscheiders zu steuern.In an alternative embodiment of the in FIG. 3 shown rotary drive, the hydraulic drive 20 may also be integrated directly into a leading to the engine fuel line. Further, also in the centrifugal oil separator according to the second aspect of the invention, it is possible to provide a controllable clutch (not shown) between the drive shaft 12 of the rotary member of the centrifugal oil separator 10 and the hydraulic drive 20 to control the rotational speed of the drive shaft 12 of the Centrifugal oil separator to control.

Claims (4)

Zentrifugal-Ölabscheider (10) für Blow-By-Gase einer Brennkraftmaschine, mit einem rotierenden Bauelement, das wenigstens eine Einströmöffnung für die Einleitung von Blow-By-Gasen aus dem Kurbelgehäuse der Brennkraftmaschine, wenigstens eine erste Abströmöffnung für die Ableitung von Luft und wenigstens eine zweite Abströmöffnung für die Ableitung von Öl sowie eine Antriebswelle (12) zum Drehantrieb des rotierenden Bauelements aufweist,
dadurch gekennzeichnet,
dass die Antriebswelle (12) des rotierenden Bauelements mit einem hydraulischen Antrieb (20) verbunden ist, der in eine Fluidleitung der Brennkraftmaschine integriert ist.Centrifugal oil separator (10) for blow-by gases of an internal combustion engine, comprising a rotating component, the at least one inlet opening for the introduction of blow-by gases from the crankcase of the internal combustion engine, at least a first discharge opening for the discharge of air and at least a second outflow opening for the discharge of oil and a drive shaft (12) for the rotary drive of the rotating component,
characterized,
in that the drive shaft (12) of the rotating component is connected to a hydraulic drive (20) which is integrated in a fluid line of the internal combustion engine. Zentrifugal-Ölabscheider nach Anspruch 1,
dadurch gekennzeichnet,
dass der hydraulische Antrieb (20) in eine zu der Brennkraftmaschine führende Kraftstoffleitung integriert ist.Centrifugal oil separator according to claim 1,
characterized,
in that the hydraulic drive (20) is integrated in a fuel line leading to the internal combustion engine. Zentrifugal-Ölabscheider nach Anspruch 1,
dadurch gekennzeichnet,
dass der hydraulische Antrieb (20) in einen Niederdruck-Kraftstoffkreislauf zwischen einer Kraftstoff-Förderpumpe (22) und einer Kraftstoff-Hochdruckpumpe (24)integriert ist.Centrifugal oil separator according to claim 1,
characterized,
in that the hydraulic drive (20) is integrated in a low-pressure fuel circuit between a fuel delivery pump (22) and a high-pressure fuel pump (24). Zentrifugal-Ölabscheider nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass zwischen der Antriebswelle (12) des Zentrifugal-Ölabscheiders (10) und dem hydraulischen Antrieb (20) eine regelbare Kupplung zur Steuerung der Drehzahl des rotierenden Bauelements des Zentrifugal-Ölabscheiders vorgesehen ist.Centrifugal oil separator according to one of claims 1 to 3,
characterized,
in that a controllable clutch for controlling the rotational speed of the rotating component of the centrifugal oil separator is provided between the drive shaft (12) of the centrifugal oil separator (10) and the hydraulic drive (20).
EP11002670.5A 2003-05-23 2004-04-30 Centrifugal oil separator for blow-by gas of combustion engine Expired - Fee Related EP2345801B1 (en)

Applications Claiming Priority (2)

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DE10323261A DE10323261A1 (en) 2003-05-23 2003-05-23 Centrifugal oil separator for blow-by gases of an internal combustion engine
EP04730533A EP1627134B1 (en) 2003-05-23 2004-04-30 Centrifugal oil separator for blow-by gases of an internal combustion engine

Related Parent Applications (2)

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EP04730533A Division EP1627134B1 (en) 2003-05-23 2004-04-30 Centrifugal oil separator for blow-by gases of an internal combustion engine
EP04730533.9 Division 2004-04-30

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EP2345801A1 true EP2345801A1 (en) 2011-07-20
EP2345801B1 EP2345801B1 (en) 2014-06-25

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EP (2) EP2345801B1 (en)
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Also Published As

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US7377271B2 (en) 2008-05-27
DE10323261A1 (en) 2004-12-16
EP1627134A1 (en) 2006-02-22
WO2004104381A1 (en) 2004-12-02
US20060090738A1 (en) 2006-05-04
EP2345801B1 (en) 2014-06-25
EP1627134B1 (en) 2011-11-02

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